Hello
I use some of my time at tube amplifiers and that is the reason I need a regulated power supply (transistors 😎 ).
Variable output voltage 100 - 350 (400) voltage
Current 100 mA. Short circuit protected
Schematic wanted.
Regards
Benny
I use some of my time at tube amplifiers and that is the reason I need a regulated power supply (transistors 😎 ).
Variable output voltage 100 - 350 (400) voltage
Current 100 mA. Short circuit protected
Schematic wanted.
Regards
Benny
Look for a Heathkit IP-32
I do not have the schematics for these unit but the specs are very close to what you need.
Three simultaneous Outputs:
Main (B+): 0 to 400 volts DC, 100 mA continuous, 125 mA max intermittent
Bias (C-): 0 to -100 volts DC, 1 mA max
Filament (A): 6.3 volts AC, 4 amps max
B+ Regulation: output variation less than 1% from no load to full load, for outputs of 100 to 400 volts; output variation less than +/-1% for a +/-10 volt variation in the 117 volt AC input
B+ Ripple: less than 10 mV RMS ripple, jitter and noise
Find a schematic and you can build it yourself.
-- josé k.
I do not have the schematics for these unit but the specs are very close to what you need.
Three simultaneous Outputs:
Main (B+): 0 to 400 volts DC, 100 mA continuous, 125 mA max intermittent
Bias (C-): 0 to -100 volts DC, 1 mA max
Filament (A): 6.3 volts AC, 4 amps max
B+ Regulation: output variation less than 1% from no load to full load, for outputs of 100 to 400 volts; output variation less than +/-1% for a +/-10 volt variation in the 117 volt AC input
B+ Ripple: less than 10 mV RMS ripple, jitter and noise
Find a schematic and you can build it yourself.
-- josé k.
Hi !
Some german sites with very well working PSU's:
One with the LR8N3 Regulator.
http://www.roehrenkramladen.de/hboexp3/hboexp3.htm
And one with comparators:
http://www.jogis-roehrenbude.de/Leserbriefe/HPV-Netzteil/250VNT_01.htm
Both work very well
Manta
Some german sites with very well working PSU's:
One with the LR8N3 Regulator.
http://www.roehrenkramladen.de/hboexp3/hboexp3.htm
And one with comparators:
http://www.jogis-roehrenbude.de/Leserbriefe/HPV-Netzteil/250VNT_01.htm
Both work very well
Manta
Sounds like you need a Heathkit IP-32 power supply, its specs are very similar.
ftp://bama.sbc.edu/downloads/heath/ip32/IP32_2.GIF
ftp://bama.sbc.edu/downloads/heath/ip32/IP32_2.GIF
if you substitute a variable resistor for one of the fixed ones this works quite nicely -- uses the SuperTex LR8N3 HV regulator:
An externally hosted image should be here but it was not working when we last tested it.
here's a schematic:
An externally hosted image should be here but it was not working when we last tested it.
Page 23 of Bas Horneman's latest DIYMAG shows a Texas Instr. TL783 schematic with a 400V regulated output.
http://www.diyaudio.com/forums/showthread.php?postid=1060325#post1060325
Stan
http://www.diyaudio.com/forums/showthread.php?postid=1060325#post1060325
Stan
the TL783 is designed with a smaller range of input voltages than the LR8N3 -- you could effect the same result with an LM317 --just protect such that the input to output voltage is limited by the zener.
the supertex devices was designed as a supervisory circuit regulator for off-line SMPS -- just repurposed.
the supertex devices was designed as a supervisory circuit regulator for off-line SMPS -- just repurposed.
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